Switch



Aug- 30, 1938- K. c. ALLlsoN 2,128,279

SWITCH Original Filed July 9, 1936 Patented Aug. 30, 1938 UNITED STATES PATENT OFFICE l Kenneth C. Allison,s 1:ri'll'irigltlon Heights, Ill., as-

, signor to Oak Manufacturing Company, Chicago, Ill., I a corporation oflllinois Application July 9, 1936, Serial No`.,89,794

Renewed October 28, 1936 3 Claims. v (Cl. 20G-11) This invention relates to a switch construction and more particularly to the construction of a gang switch useful in radio receivers and other places where a large number of circuits must be ,5 simultaneously acted upon. It is an object of this invention to devise a 4simple and compact stator construction which will permit contacts insulated from each other to be supported on opposite sides of the stator by a single supporting l means. l In the drawing, Figure 1 is a plan view of a single switch section comprising a 4stator and rotor.

Figure 2 is a sectional view along the line 2-4-2l l of Figure 1.

Figure 3 is a detail of an insulator. The switch section shown in Figure 1 comprises a ilat plate I of rigid insulating material having a plurality of apertures 2 disposed on the circumi'erence of a circle. Plate I is of a generally circular contour and has protruding portions 3 and 4 on opposite sides thereof. In each portion 3 and 4 a mounting aperture 5 is provided so that the entire switch section may be` mounted on bolts as shown, for example, in Patent 2,012,492. The interior of the stator is cut to form a region I. Along the inside edge of stator I indentations 1 are provided registering with each of the apertures for a purpose to be later explained.

In one or more of the apertures two stator contacts may be mounted as shown in Figure 2. Below plate I a contact I0 is provided comprising a bent over strip of spring metal forming a soldering portion II and a mounting portion I2 ter' minating in jaws i3 and I4. Jaw Il extends upwardly at I5 and is bent over at I5 and extends downwardly toward the plane of mounting portion I2. Jaw I4 extends upwardly but a short distance at I1 from mounting portion I2 and then is bent downwardly at il and at I8 is bent upwardly again to form a cooperating jaw. Both Jaws have their side edges 25 and 2i bent upf 4warclly to provide open guiding surfaces.

A rivet 25 passes upwardly through-stator I` and retains contact I5 rigidly in position. The vupwardly bent portion Il of the upper Jaw is adapted to ilt in indentation` 1 and retain the I2 oppositely to each other and gradually taper together. It will be noted that the lower Jaw 3l is not bent down as far below the plane of the mounting portion, as jaw 3| is above this plane. This is so that the two inside jaws Il and 30 will clear each other. It will be noted furthermore, that jaws 29 and 30 extend inwardly toward the center of the stator further than the lower con 5 tact jaws. It is obvious, however, that both opposing contacts may be of the saine shape and extend the same distance inwardly if so desired.

To support upper contact 25 in spaced relationship to metallic rivet 25 a small insulating V1l) block 35 is provided. This block has an aperture 36 through which rivet 25 passes and snugly fits. Block 35 is long enough to extend from the outer to the inner edge of stator I. This bloc): is just a bit wider than the contacts and' is prol5 vided on the opposite sides thereof with indentations 31 and 38. Contact 25 is rigidly maintained in position against rotary movement by soldering portionv 21 extending upwardly into indentav tion I1 of the insulating block 35. Upwardly extending portion 3I of Jaw 29 is disposed in indentation 38 while downwardly extending portion 32 of lower jaw 30 extends into indentation 2 of the stator. The contact is kept from movement along its length by the upwardly extending por- 25 tions4 thereof engaging the bottoms 35 and 45 of indentations 31 and Il respectively. The top of the rivet 4I is turned over tightly against insulating block 35 to maintain the oppositely disposed contacts rigidly in position.

Cooperating with the stator contacts is a flat insulating rotor 5I! `centrally disposed thereof. Rotor 50 is oi insulating material and is provided near the periphery thereof with a series of apertures 52. A plurality of .fiat segmental contacts is shown at 5I and has a generally circular outer and inner edge. The outer edge is provided with a contact extension 5l which may be of any angular'extent and may be provided in any number or even omitted. This extension 40 54 is adapted to'engage short jaws I3 and I4 of contact I0. The inner edge of rotor contact 53 is provided with a'plurality of lingers 55 and Il which are bent through apertures 52 and function yas a retaining means for the contact. The 45 rotor 50 may carry on the opposite side thereof one or more similar contacts l5 similarly provided with ilngers and mountedon rotor 5l by such fingers engaging apertures -52. It will be noted that the segmental contacts ,lie fiat on o opposite sides' of'rotor l5 and extend therebeyond to form active rotor contact surfaces.

Having described the invention, what is claimed is '1. 1n n electric switch. s nat am maar? l ing member having an interior region cut out therefrom with slots on the inner edge of said stator and apertures through said stator adjacent said slots, a rotor having contacts mounted on opposite sides thereof disposed in said interior regin, contacts mounted in pairs on said stator at certain apertures, one Contact being on one side of said stator and another contact on the other side thereof, each contact having an outwardly extending connecting' portion. bent away from the stator plane, a body "portion disposed on said stator at an aperture thereof and a contacting portion extending inwardly and having` a part thereof bent in to the stator plane and tting into the corresponding slot in the stator, an insulating block disposed above said one contact and having a slot in the outer edge into which the connecting portion of said one contact tits, said one contact having an aperture concentric with the stator aperture but larger, said other contact having an aperture similar to and registering with the stator aperture, and metallic means engaging said other contact and passing through the concentric apertures to maintain said contacts and insulator rigidly on said stator.

2. In an electric switch a flat stator insulating member having an interior region cut out therefrom with slots on the inner edge of said stator and apertures through said stator adjacent said slots, a rotor having contacts mounted on opposite sides thereof disposed in said interior region, contacts mounted in pairs on said stator at certain apertures, one contact being on one side of said stator and another contact on the other side thereof, each contact having -an outwardly extending connecting portion bent away from the stator plane, a body portion disposed on the said stator at an aperture thereof and a contacting portion extending inwardly toward said rotor, said contacting portion comprising two thicknesses of metal bent away from each other and approaching each other at their freev the connecting portion of said one Contact fits, one of said jaws being adapted to fit into the inner slot of said block, said one contact having an aperture concentric with the stator aperture but larger, said other contact having an aperture similar to and registering with the stator aperture, and metallic means engaging said other contact and passing through the concentric apertures to maintain said contacts and insulator rigidly on said stator.

3. In an electric switch, a iiat stator insulating member having an interior region cut out therefrom with slots on the inner edge of said stator and apertures through said stator adjacent said slots, a rotor comprising a flat insulating disc disposed in said inner region, at contacts mounted on opposite sides of said rotor, contacts mounted in .pairs on said stator at certain apertures, one contact being on one side of said stator and another contact on the other side thereof, each contact having a body portion disposed at said stator at an aperture thereof' and having a connecting portion extending outwardly from said body portion bent away from said stator plane and h-aving a contacting portion extending from said body portion inwardly toward the rotor contacts, said contacting portion comprising two thicknesses of metal bent to form jaw edges, and one of said jaws of each contact being bent into the stator plane and fitting into the corresponding slot in the stator, an insulating block disposed above one of said contact pairs, said block having slots in the opposed edges overlying the inner and outer stator edges, the connecting portion of said one contact tting into the outer slot of said block and one of the jaws of the contacting portion of said contact fitting into the inner slot of said block, said contact jaws being adapted to embrace a rotor contact, said one contact having an aperture in the body portion larger than but con centric with the stator aperture, the other contact of said pair having an aperture similar to and registering with the said aperture, and metallic means engaging said other contact and passing through the concentric apertures to maintain said contacts and insulator rigidly on said stator.

KENNETH C. ALLISON. 

